{% load filth_mark %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>add过滤器</title>
</head>
<body>
{#{{ '1'|add:'2' }}<br>#}
{#{{ values1|add:values2 }}#}
{{ 'abcdef'|splitst:'1,3' }}
</body>
</html>